USC has lost one of its biggest projected playmakers heading into the 2013 season.

Receiver George Farmer sustained two torn left knee ligaments—anterior cruciate and medial collateral—during practice earlier this week. Farmer will have surgery on his knee as soon as the swelling subsides, but he will miss the entire season.

All-American receiver Marqise Lee returned to practice on Thursday for the first time since he began dealing with his own knee issues last month. Lee said that Farmer’s “mind-set is amazing.”

Still, that’s one less playmaker for the quarterback who’ll replace veteran Matt Barkley.

Lee and sophomore Nelson Agholor are the go-to guys now.

“You really feel bad for him because it seems like something happens every time that he’s starting to make a turn,” coach Lane Kiffin said of Farmer. “Unfortunately, this one is very serious.”

Kiffin also announced on Thursday that highly regarded freshman safety Su’a Cravens will have knee surgery to repair a torn meniscus. That’s the same surgery starting running back Silas Redd had last month. Both are expected back in time for fall camp.